Predicted to enable DNA binding activity. Involved in chromosome condensation and oocyte karyosome formation. Located in cytoplasm; nuclear envelope; and nucleoplasm. Is expressed in adult heart. Used to study Nestor-Guillermo progeria syndrome. Human ortholog(s) of this gene implicated in Nestor-Guillermo progeria syndrome. Orthologous to human BANF1 (barrier to autointegration nuclear assembly factor 1).